Amazon.com Product Description
December's birthstone shows off its dreamy sky blue color in this gift-worthy pendant and earring set, crafted in radiant and durable 14 karat white gold. It highlights faceted rounds of blue topaz, mounted securely in four-prong settings of polished white gold. The stud earrings are featured on posts with friction backings, while the solitaire pendant is appointed with a split bail and showcased on an 18-inch box chain.
About Birthstone Jewelry

December Birthstone: Blue Topaz
Blue topaz is prized for its soothing and captivating blue color, which is usually divided into three categories: sky blue for the palest shade, Swiss blue for the more saturated medium shade, and London blue for the deepest shade. Also known as an artist's stone, blue topaz is reputed to inspire creativity and enhance concentration
History of Birthstones
Chances are you can name your birthstone, but have you ever wondered how certain stones came to be associated with particular months? Most gem scholars trace the tradition to the Old Testament story of Aaron, whose breastplate was decorated with twelve precious stones, one for each of the twelve tribes of Israel. Over time, these stones were linked with certain powers and tied to particular astrological signs, and later to calendar months.
There are many variations of birthstone lists, including Mystical birthstones, which originate from Tibet and date back over a thousand years, and Ayurvedic birthstones, associated with ancient Indian medicine and beliefs. Birthstones have also been tied to ancient Pagan religions, and even to the collective wisdom of the legendary lost city of Atlantis.
The Modern birthstone list, perhaps the most universally known, was released by the American National Association of Jewelers and officially adopted in 1912. Whether you embrace birthstone lore, or look upon it with a skeptical eye, there is an undeniable appeal to collecting a beautiful gemstone that is reputed to hold special power, meaning, and good fortune just for you.